condition mean min max ZT0-3 0.144986787 0.000121861 0.3352275 ZT4-7 0.30653949999999996 0.30653949999999996 0.30653949999999996 ZT8-11 0.281674 0.281674 0.281674 ZT12-15 0.014967775 0.0 0.02993555 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0